Volcano Engine Doubao vs SeaLink: Token Pricing, Speed & Intelligence
Full comparison of Volcano Engine Doubao and SeaLink — live token pricing, latency, throughput, context window, strengths, weaknesses, and best use cases. Rates sourced from public APIs — verify before use.
Volcano Engine Doubao
Doubao Seed 2.1 — ByteDance's frontier reasoning LLM via Volcano Engine
Volcano Engine Doubao is the LLM API from ByteDance, available via the Volcano Engine cloud platform. The Doubao Seed 2.1 series includes Pro (frontier reasoning) and Turbo (balanced performance). Models are optimised for Chinese and English and are competitive with frontier Western models on reasoning benchmarks.
SeaLink
Embeddings API gateway (Singapore) — Gemini Embedding models, USD pricing, no chat completions
SeaLink is a Singapore-based embeddings API gateway providing access to Gemini Embedding 001 and Gemini Embedding 2. Pricing is in USD per 1M input tokens with no output charge. SeaLink does not offer chat completions — it is an embeddings-only service. Billing is in USD.
Key metric comparison
—
—
—
—
—
—
—
—
—
—
—
—
Live token pricing
Strengths and weaknesses
Volcano Engine Doubao
SeaLink
Key differentiators
Doubao Seed 2.1 brings ByteDance's frontier reasoning capability to the API market — competitive with top Western models on reasoning tasks, with strong Chinese-English bilingual performance.
Embeddings-only API gateway in Singapore — Gemini Embedding 001 ($0.135/1M) and Gemini Embedding 2 ($0.18/1M) with USD billing and no output charge.
Frequently asked questions
Volcano Engine Doubao FAQs
What is Doubao Seed 2.1?
Doubao Seed 2.1 is ByteDance's latest LLM series, available via Volcano Engine. Pro is the frontier reasoning tier and Turbo is the balanced tier. Both support Chinese and English.
How much does the Doubao API cost?
Doubao Seed 2.1 Pro is $6.00/$30.00 per 1M input/output tokens. Doubao Seed 2.1 Turbo is $3.00/$15.00 per 1M tokens. See the Volcano Engine pricing page for current rates.
Is Doubao available outside China?
Doubao is available via Volcano Engine's international API, but the platform and documentation are primarily Chinese. Western developers may find setup more involved than with OpenAI-compatible providers.
SeaLink FAQs
What is SeaLink?
SeaLink is a Singapore-based embeddings API gateway providing access to Gemini Embedding 001 and Gemini Embedding 2. It does not offer chat completions. See sealink.io/pricing for current rates.
Does SeaLink offer chat completions?
No. SeaLink is an embeddings-only service. It provides Gemini Embedding 001 and Gemini Embedding 2 for vector generation workloads such as semantic search and RAG pipelines. It does not offer chat, reasoning, or other completion modalities.
How much does SeaLink cost?
As of October 2026: Gemini Embedding 001 is USD 0.135 per 1M input tokens; Gemini Embedding 2 is USD 0.18 per 1M input tokens. There is no output charge for embeddings. See sealink.io/pricing for current rates.
Provider resources
Volcano Engine Doubao — Doubao Seed 2.1 — ByteDance's frontier reasoning LLM via Volcano Engine
Volcano Engine Doubao is the LLM API from ByteDance, available via the Volcano Engine cloud platform. The Doubao Seed 2.1 series includes Pro (frontier reasoning) and Turbo (balanced performance). Models are optimised for Chinese and English and are competitive with frontier Western models on reasoning benchmarks.
Doubao Seed 2.1 brings ByteDance's frontier reasoning capability to the API market — competitive with top Western models on reasoning tasks, with strong Chinese-English bilingual performance.
SeaLink — Embeddings API gateway (Singapore) — Gemini Embedding models, USD pricing, no chat completions
SeaLink is a Singapore-based embeddings API gateway providing access to Gemini Embedding 001 and Gemini Embedding 2. Pricing is in USD per 1M input tokens with no output charge. SeaLink does not offer chat completions — it is an embeddings-only service. Billing is in USD.
Embeddings-only API gateway in Singapore — Gemini Embedding 001 ($0.135/1M) and Gemini Embedding 2 ($0.18/1M) with USD billing and no output charge.
Key strengths compared
Volcano Engine Doubao
- Doubao Seed 2.1 Pro competes with frontier Western models on reasoning benchmarks
- Strong Chinese-English bilingual performance backed by ByteDance's data scale
- Volcano Engine provides enterprise-grade infrastructure with global CDN
- Primarily accessible via Volcano Engine — less familiar to Western developers
- Documentation and support primarily in Chinese
SeaLink
- Gemini Embedding 001 and Gemini Embedding 2 at competitive USD rates
- Singapore-based — low latency for Southeast Asia workloads
- Simple USD billing with no output charge for embeddings
- Embeddings only — no chat completions or other modalities
- Small catalog limited to Gemini Embedding models
Key weaknesses compared
Volcano Engine Doubao
- Primarily accessible via Volcano Engine — less familiar to Western developers
- Documentation and support primarily in Chinese
- Smaller international ecosystem than OpenAI or Anthropic
SeaLink
- Embeddings only — no chat completions or other modalities
- Small catalog limited to Gemini Embedding models
- Newer provider with limited public track record
Provider category context
Volcano Engine Doubao is a frontier lab, founded in 2012. SeaLink is a inference api, founded in 2024. Volcano Engine Doubao as a frontier lab trains and serves its own proprietary models. SeaLink as an inference API provider hosts open-weight models — typically offering lower prices for equivalent capability tiers but without access to proprietary frontier models.
How to choose between them
Choose Volcano Engine Doubao if you need Chinese NLP. Choose SeaLink if you need gemini embedding 001 and gemini embedding 2 at competitive usd rates. For high-volume production workloads, run a cost comparison using the token pricing table above with your actual prompt/completion token ratio — the cheapest provider depends heavily on your input-to-output token ratio.